Pump for pumping fuel has a pump casing with a pumping chamber fitted with inlets and outlets as well as a pumping wheel in the chamber fastened on a drive shaft rotating on bearings in the casing.

摘要

Inlets (8) and outlets (24) supply a pumping chamber (5) in a pump casing (7). A pumping wheel (3) in the pumping chamber fastens on a rotary drive shaft (2) that rotates on bearings in the pump casing. Pumping chamber surfaces adjacent to surfaces on the pumping wheel and pumping wheel surfaces adjacent to surfaces on the pumping chamber have a thinner, harder coating.